Though polygraph has been the mainstay for government and police departments since World War II, it has undergone substantial transformation in recent years. Fu

The polygraph, often portrayed as a magic mind-reading machine, is still controversial among experts, who continue heated debates about its validity as a lie-de

John F. Sullivan was a polygraph examiner with the CIA for thirty-one years, during which time he conducted more tests than anyone in the history of the CIA's p

The manner in which criminal investigators are trained is neither uniform nor consistent, ranging from sophisticated training protocols in some departments to o

In this thoroughly updated and revised edition of Counterintelligence Theory and Practice, Hank Prunckun provides all of the elements required for a successful